Year	Percent
1976-01-01	0.051243000000000000
1977-01-01	0.055772000000000000
1978-01-01	0.053216999999999993
1979-01-01	0.022618000000000000
1980-01-01	0.030854000000000003
1981-01-01	0.079774000000000000
1982-01-01	0.048264999999999995
1983-01-01	0.092206000000000000
1984-01-01	0.094011000000000000
1985-01-01	0.111581000000000000
1986-01-01	0.202052000000000000
1987-01-01	0.197794000000000000
1988-01-01	0.097876999999999990
1989-01-01	0.180238000000000000
1990-01-01	0.094503000000000000
1991-01-01	0.063631000000000000
1992-01-01	0.067329000000000000
1993-01-01	0.073239000000000000
1994-01-01	0.075235000000000000
1995-01-01	0.080414000000000000
1996-01-01	0.144654000000000000
1997-01-01	1.071200000000000000
1998-01-01	1.040300000000000000
1999-01-01	1.158710000000000100
2000-01-01	1.510730000000000000
2001-01-01	1.661600000000000000
2002-01-01	1.428120000000000000
2003-01-01	1.956929999999999800
2004-01-01	2.399950000000000000
2005-01-01	3.529560000000000000
2006-01-01	5.265290000000000000
2007-01-01	8.043840000000000000
2008-01-01	6.805180000000000000
2009-01-01	6.101100000000000000
2010-01-01	4.886670000000000000
2011-01-01	4.352519999999999000
2012-01-01	4.100250000000000000
2013-01-01	3.918350000000000000
2014-01-01	3.566980000000000500
2015-01-01	3.608940000000000000
2016-01-01	3.586160000000000000
2017-01-01	3.479469999999999600